Rosie is building an electromagnet. She has set her electromagnet circuit up with an aluminium core, a wire wrapped around the core ten times, a 6V power pack, an ammeter, and a variable resistor.
Explain to Rosie how she could test the effectiveness of her magnet and improve its design
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Explanation:
The strength of the electromagnet can be increased by increasing the current running through the circuit. Rosie could replace her aluminium core with an iron core. This would increase the strength of the electromagnet. This is because aluminium is not magnetic
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